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Fox Thermal FT4A Instruction Manual

Gas mass flow meter
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FT4A
Fox Thermal Gas Mass Flow Meter
Instruction Manual
Document #107265
Rev H
831.384.4300 | 399 Reservation Rd, Marina, CA 93933 |
foxthermal.com

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Summary of Contents for Fox Thermal FT4A

  • Page 1 FT4A Fox Thermal Gas Mass Flow Meter Instruction Manual Document #107265 Rev H 831.384.4300 | 399 Reservation Rd, Marina, CA 93933 | foxthermal.com...
  • Page 3 Please note that Fox Thermal reserves the right to change and/or improve the product design and specification without notice.

  • Page 4: Table Of Contents

    Model FT4A Table of Contents 1. Introduction p. 4-19 a. Quick Start Guide ............... . . p. 6 b.
  • Page 5 Model FT4A Table of Contents 7. Appendices p. 98-109 a. Specifications ................p. 96 b.

  • Page 6: Quick Start Guide

    Check the remaining flow meter settings by accessing the meter settings either through the front panel of the display or by using the FT4A View™ software tool. Record the settings in the spaces given for items A - F on the following page.
  • Page 7 After applying power to your meter, check items A - E below by accessing the meter settings either through the front panel of the meter's display or by using the FT4A View™ software tool. Which flow units have been set in meter? (SCFM, KG/H, etc..)
  • Page 8 Model FT4A Introduction Fig. 1.1: FT4A Menu Tree - Main Menu Enter menu by scolling to display 4 and entering the password MAIN MENU I/O FLO DSP EXIT Display Menu, p. 12 Flow Menu 1, p. 10 If RS485 hardware detected...
  • Page 9 Model FT4A Introduction Fig. 1.2: FT4A Menu Tree - Digital Outputs MAIN MENU I/O    FLO    DSP    EXIT Set I/O             PUL    420    EXIT Not used OUT= Pulse Pulse NXT                            OK HiFloAlm LoFloAlm HiTempAlm LoTempAlm Pulse Alarm output System Alarm High Flow Alarm Select 1 of  3  methods to scale  the pulse output OUT= HiFloAlm NXT                            OK Pulse Output P/U     U/P     FEQ    EXIT HiFloAlm=500 SCFM CHG                          OK PLS/UNT=2 UNT/PLS=0.5 MaxFreq=100Hz CHG                            OK CHG                            OK...
  • Page 10 Model FT4A Introduction Fig. 1.3: FT4A Menu Tree - Flow Menu 1 MAIN MENU I/O    FLO    DSP    EXIT FLOW MENU 1 DGN   UNT   FM2   EXIT Flow Menu 2 Menu, p. 11 DIAGNOSTIC SCFM FLO UNT=SCFM SCFH SIM   CAL‐V              EXIT NXT                              OK NM3/H NM3/M KG/H KG/M KG/S TMP UNT=° F Deg F LBS/H Simulate Flow? Deg C NXT                             OK LBS/M YES                             NO...
  • Page 11 Model FT4A Introduction Fig. 1.4: FT4A Menu Tree - Flow Menu 2 MAIN MENU I/O    FLO    DSP    EXIT FLOW MENU 1 DGN   UNT   FM2   EXIT FLOW MENU 2 GAS    SPC    PRM    EXIT Parameters Level 2 password Flow cutoff  in selected units K fact = 0% Cutoff=12.5 SCFM CHG                             OK CHG                            OK Gas-SelectX Menu, p. 14 ® Pipe_id=4.026 In RESTORE DATABASE? Pipe id in inches or mm CHG                            OK YES                              NO Filter=0.8 Sec RESET CRC? Flow  Filter in seconds CHG                            OK YES                              NO Min = 0.8, max = 10...
  • Page 12 Model FT4A Introduction Fig. 1.5: FT4A Menu Tree - Display Menu MAIN MENU I/O    FLO    DSP    EXIT DISPLAY/PASSWORD DSP            PSW    EXIT Display 1  Line 1 FLo rate DSP1L1=FLo rate PASSWD=1234 Total NXT                             OK CHG                            OK Elps Display 1  Temp Line 2 Alarm FLo rate DSP1L2=Total Total NXT                             OK Elps Display 2  Temp Line 1 Alarm FLo rate DSP2L1=Temp Total NXT                             OK...
  • Page 13 Model FT4A Introduction Fig. 1.6: FT4A Menu Tree - CAL-V™ Menu MAIN MENU I/O    FLO    DSP    EXIT FLOW MENU 1 DGN   UNT   FM2   EXIT DIAGNOSTIC MENU SIM    CAL‐V           EXIT  CAL‐V MENU VER                         EXIT     VERIFY CAL‐V? YES                              NO Flo: Hold value Hold value Go to zero NXT                EXIT     OK Take Control Off‐line          EXIT     OK      Verifying CAL‐V  Please Wait      Verifying CAL‐V  0.512           T=123 Displays a CAL‐V value  Displays the test’s  during test count down timer    CAL‐V=2.321     CAL‐V=0.259    CAL‐V=0.911    Fail                        OK    Pass                        OK   Warning                   OK...
  • Page 14 Model FT4A Introduction Fig. 1.7: FT4A Menu Tree - Gas-SelectX Menu ® MAIN MENU I/O    FLO    DSP    EXIT The most recent list of available gases can be found on the Fox Thermal FLOW MENU 1 website: DGN   UNT   FM2   EXIT www.foxthermal.com/products/FT4A.php#gasSelectX FLOW MENU 2 GAS              PRM    EXIT GAS=O&G Mix Pure Gas NXT                             OK O&G Mix Be sure mixture  equals 100%.
  • Page 15 Model FT4A Introduction Fig. 1.8: FT4A Menu Tree - Log Menu 1 Enter Log Menu: Press F1 & F2 at the same time F3 & F4 pressed at the same time will  Press F4 to return to normal mode initiate a "Total" reset Enter Log Menu: Press F1 & F2 at the same time LOG MENU 1 Press F4 to return to normal mode Engineering Screens LOG              ENG    EXIT Press F1 to navigate up LOG MENU 1 Press F2 to navigate down LOG    TOT   ENG    EXIT Press F4 to return to normal mode Press F1 to navigate up Press F2 to navigate down 3124.6 SCFM Flow rate measured by the meter Screen 10 Press F4 to return to normal mode csv = 0.3432 Volt Current Sense Voltage of sensor measurement circuit Log Menu 2, p. 16 Flow rate measured by the meter...
  • Page 16 Model FT4A Introduction Fig. 1.10: FT4A Menu Tree - Log Menu 2 Enter: Press F1 & F2 at the same time F3 & F4 pressed at the same time will  Press F4 to return to normal mode initiate a "Total" reset LOG MENU 1 LOG             ENG    EXIT LOG MENU 2 Press NXT (F1) to navigate down GAS    CFG   VAL    EXIT Press PRV (F2) to navigate back up GAS=Pure Gas GAS=Mix GAS=O&G Mix Flow: SCFM CAL‐V=0.1                                    OK                                  OK                                OK NXT    PRV              EXIT NXT    PRV              EXIT Temp: °F CAL‐V err= ‐1.22% NXT    PRV              EXIT NXT    PRV              EXIT GAS=Methane Air% = 0.0 Methane% = 45.0 Ref Press: Psia CAL‐V=Pass...
  • Page 17 Introduction Welcome Thank you for purchasing the model FT4A thermal gas mass flow meter from Fox Thermal. The FT4A is one of the most technically advanced flow meters in the world. Extensive engineering effort has been invested to deliver advanced features, accurate measurement performance and outstanding reliability.
  • Page 18 Fox Thermal's DDC-Sensor™ provides a technology platform for calculating accurate gas correlations. The FT4A correlation algorithms allow the meter to be calibrated on a single gas in the factory while providing the user the ability to select other gases in the Gas-SelectX gas menu.
  • Page 19 4-20mA scaling, pulse output scaling, pipe area, flow cutoff, flow filtering, display configurations, diagnostics, communication parameters, data logging, and alarm limits. Fig. 1.11: FT4A Function Diagram Standard I/O 12-24VDC Input...

  • Page 20: General

    3. The enclosure cover must be closed during installation except during configuration or during installation. 4. Mounting FT4A in direct sunlight can cause the temperature inside the enclosure to increase beyond design limits, resulting in failure of LCD display and reduced component life.

  • Page 21: Lateral Placement

    Instructions for Flow Meter Lateral Placement Install the model FT4A flow meter so that it is far enough away from bends in the pipe, obstructions, or changes in line sizes to ensure a consistent flow profile. See Fig. 2.1 below for your meter type.
  • Page 22 Fig. 2.2: Installation at 180° Alternate Installations - Vertical Pipes or Restricted Installation Spaces When restricted physical installation space exists, the FT4A can also be installed at other angles. Please note that the display can be rotated in 90º increments.
  • Page 23 2. Assemble the compression fitting and branch fitting hand tight onto the probe of the FT4A. 3. Insert the probe into the hole in the pipe and use the FT4A probe and compression fitting to align the branch fitting with the hole and the probe perpendicular to the pipe.

  • Page 24: Installation Depth

    Model FT4A Installation Installation Depth - Insertion Only The installation depth of the sensor in the pipe is dependent on the pipe size. To get the most accurate reading, proper placement of the sensor window within the pipe is necessary. As shown in Fig 2.5, the end of the sensor window should be 0.73"...
  • Page 25 Installation Rotating the Enclosure The model FT4A enclosure has been designed to allow the enclosure to rotate for optimal viewing of the display. To rotate the enclosure, first loosen the two set screws near the Flow Direction Indicator, then unscrew and remove the flow direction indicator. Rotate the enclosure into the desired position, reinstall the flow direction indicator, and tighten the set screws.
  • Page 26 Model FT4A Installation Changing the Orientation of the FT4A Display The display can be rotated in 90° increments for optimum viewing of the screen. First, open the enclosure by unscrewing the enclosure cap and loosen the two captive screws to open the display assembly.

  • Page 27: Mounting Instructions

    Mounting Instructions - Compression Fittings (New Insertion Meters Only) FT4A insertion style flow meters are mounted through a 0.781" hole and a 1-inch female NPT branch outlet in the customer's pipe. Insertion style flow meters are not designed for use in pipes smaller than 1½".
  • Page 28 Model FT4A Installation Mounting Instructions - Compression Fittings (Inline and Insertion Meters Previously Installed) In cases where a compression fitting has already been swaged in an inline flow body or an insertion meter, use the following procedure. • Carefully insert the probe with swaged ferrules into the fitting until the front ferrule seats against the fitting (see figure 2.9).
  • Page 29 Model FT4A Installation Installation of a New Retractor Assembly 1. Remove collar clamp from probe using a 3/16" Hex Key. 2. Remove meter probe from retractor assembly and leave the ball valve open. Keep the collar spacer on the probe so it is not misplaced.
  • Page 30 Model FT4A Installation 4. Carefully slide the probe through the retractor assembly and through the hole to see if there is interference by touching the pipe wall with the end of the probe on the far side or until the probe cannot go deeper.
  • Page 31 Model FT4A Installation 5. Using the equation (L + D/2 + 0.73") from Figure 2.11, calculate the insertion depth and mark on the probe while measuring from the end of the probe. 6. The Retractor Clearance table of Figure 2.11 lists the space required to remove the meter from the retractor.
  • Page 32 Model FT4A Installation 7. Insert probe back into the retractor to the depth mark and hand-tighten the compression fitting. Make sure collar spacer is in place on the probe. 8. Verify that flow direction indicator is in line with pipe and in the direction of flow.

  • Page 33: Wiring (Electrical)

    Model FT4A Wiring Wiring Instructions To wire the FT4A connect the power and signal wires to the terminal blocks according to the label and instructions on the following pages. Fig. 3.1: FT4A Wiring Access LEDs PORT DETAIL WIRING TERMINALS To wire the FT4A, unscrew and remove the enclosure cap. Loosen the two captive screws on the display assembly and rotate it open to access the wiring terminals.
  • Page 34 DO NOT OPEN THE ENCLOSURE WHEN ENERGIZED OR AN EXPLOSIVE ATMOSPHERE IS PRESENT. • Connect earth ground to a chassis ground screw on the inside of FT4A enclosure. • All plumbing and electrical installations of flow meters must be in compliance with local codes, the end user’s best engineering practices, and manufacturer’s recommendations.

  • Page 35: Signal Wiring

    Model FT4A Wiring Power Wiring For wiring the 12 to 24VDC power, use stranded copper wire. Twisted pair shielded cable is recommended. Supply connection wiring must be rated for at least 90°C. Grounding The enclosure must be properly grounded with a quality earth ground. 16 gauge, stranded wire is recommended.
  • Page 36 6 Watts minimum. (With 12VDC power, the FT4A can use up to 500mA. With 24VDC power, the FT4A can use up to 250mA.) A 20 Watt or greater power supply is recommended to ensure it can provide enough current under all temperature, ventilation, and power on conditions.
  • Page 37 Model FT4A Wiring 4-20mA Output Wiring: Customer-Supplied Power Source Bring the 4-20mA wiring in through either conduit hub. Connect the 4-20mA wiring as shown in the diagram below. Fig. 3.3: 4-20mA Output Wiring for Customer-Supplied Power Source Customer PLC or DCS...
  • Page 38 4-20mA Output Wiring: Loop Power Provided by FT4A Bring the 4-20mA wiring in through either conduit hub. Connect the 4-20mA as shown in the diagram below. Fig. 3.4: 4-20mA Output Wiring for Loop Power Provided by FT4A Customer PLC or DCS FT4A...
  • Page 39 20mA of current. Pulse or alarm selection is programmed using the display or FT4A View™. Only one option, pulse or alarm, can be active at a time.
  • Page 40 The pulse/alarm output is an open collector circuit capable of sinking a maximum of 20mA of current. Pulse or alarm selection is programmed using the display or FT4A View™. Only one option, pulse or alarm, can be active at a time.
  • Page 41 Termination Resistor Connect a termination resistor across the receive/transmit signals of the last device on the communication line. To connect the 121 ohm termination resistor on the FT4A, set jumper W1 to the terminated position (see detail below). Disconnect the termination resistor on all other external RS485 devices. The termination resistor of the FT4A is disconnected by setting jumper W1 to the "open"...

  • Page 42: Hart Wiring

    Model FT4A Wiring HART Wiring The HART connections are made as shown in the diagram below. HART 4-20mA Output Wiring: Customer-Supplied Power Source The 4-20mA current loop and HART modem connections are made as shown in the diagram below. Fig. 3.8: HART and HART 4-20mA Output Wiring, Customer-Supplied Power Source...
  • Page 43 Model FT4A Wiring HART 4-20mA Output Wiring: Handheld Communicator The 4-20mA current loop connections are made as shown in the diagram below. A handheld HART communicator can be connected to test points TP12 (+) and TP13 (-) with clip leads or to the 4-20mA terminal block.
  • Page 44 HART 4-20mA Output Wiring: Loop Power Provided by FT4A The 4-20mA current loop and HART modem connections are made as shown in the diagram below. Fig. 3.10: HART 4-20mA Output Wiring, Loop Power Provided by FT4A Customer PLC or DCS...

  • Page 45: Operation (Standard Operation)

    FT4A configuration data. FT4A Display and Configuration Panel The FT4A has a 2 line x 16 character display with 4 mechanical buttons. The meter can be programmed by using the display and configuration panel. The configuration panel can be accessed by removing the FT4A cap.
  • Page 46 Reset Total Screen Pressing the F3 and F4 keys at the same time brings up the Reset Total screen prompt. Fig. 4.2: FT4A Measurement Mode Display Screen Navigation F1 key: Moves up one screen F2 key: Moves down one screen 1456.5 SCFM...

  • Page 47: Programming

    Model FT4A Operation Programming: Data Entry using the Display and Configuration Panel There are 2 basic types of menu entries: one for changing value or string and one for selecting from a selection list. To Change a Value or String : VALUE = 0.91234...
  • Page 48 Model FT4A Operation If the wrong password is entered, the message “Wrong Password” will display and then return to the programming entry screen. Main Menu If the password is accepted, the Main Menu screen will be shown: MAIN MENU EXIT This is the Main Menu screen for the programming mode.
  • Page 49 Model FT4A Operation 4 mA = 0 SCFM Enter the value for the 4mA and press OK (F4). NOTE! When the flow rate exceeds the programmed value for the 20mA set point, the analog output will stay at 20mA and an alarm code will be generated.
  • Page 50 Model FT4A Operation Pulse/alarm Output The Pulse/alarm feature can be accessed from the Main Menu, press I/O (F1). EXIT Press PUL (F2) to select the pulse output. The following screen will show: OUT = Pulse Press NEXT (F1) to cycle through output options until you have the selection for "OUT=Pulse" and press OK (F4).
  • Page 51 MaxFlo=5000 SCFM NOTE! If the flow rate exceeds the maximum pulse rate (frequency), the output will stay at 100 Hz and the FT4A will issue an alarm code. Alarm Output To access the Pulse/alarm feature, press I/O (F1) key from the Main Menu screen. The screen will...
  • Page 52 Model FT4A Operation Then press NXT (F1) to select the correct alarm and press OK (F4). Selections are: Not used Pulse HiFloAlm = High Flow Alarm LoFloAlm = Low Flow Alarm HiTempAlm = High Temperature Alarm LoTempAlm = Low Temperature Alarm System Alarm When the output is set to Alarm and there is no alarm condition, the output will be on (0 volts).
  • Page 53 Model FT4A Operation NOTE! Any selection other than “None” requires the communication option for the selected communication type. If enabling a communication option, see the Communications Protocols section of this manual. Display Setup There are four display screens that you can cycle through in normal operating mode (see Figure 4.2 on p.
  • Page 54 Model FT4A Operation When the selection is correct, press OK (F4) to accept. The display will then go through the same process for all 4 lines of the 2 programmable displays (DSP1L1, DSP1L2, DSP2L1 and DSP2L2). After the last line of Display 2 is accepted, the display will show the following menu: ALTERNATE = Off This menu allows you to alternate between menu display 1 and 2 every few seconds.
  • Page 55 These values will be set at Fox Thermal using information supplied by the customer. These values can be changed to match a new application. The units setting is accessed from the Main Menu. To access...
  • Page 56 Model FT4A Operation Temperature Units After pressing OK (F4) to accept the Flow unit the display will prompt for the temperature unit setting: TMP UNT= ° F Press NXT (F1) to change selection and OK (F4) to accept. Selections for Temperature units are: °C or °F...
  • Page 57 Model FT4A Operation Gas Density After the reference pressure value is accepted, the FT4A will recalculate and display gas density at user's reference temperature and pressure: DNS= 1.2930 KG/m3 The gas density is for information only. Press OK (F4) to continue.
  • Page 58 Model FT4A Operation Programming Flow Parameters Flow Cutoff The first parameter is Flow Cutoff: CUTOFF = 2.0 SCFM Enter the value for the flow cutoff and then press OK (F4). When the flow rate falls below the flow cutoff, the flow meter will display a flow value of zero.
  • Page 59 Model FT4A Operation HiFloAlm = 1234 SCFM Press OK (F4) to accept the value. Low Flow Rate Alarm This is the lower flow limit alarm value that can be associated with the alarm output. An alarm code is generated when the flow value is below this limit. If no alarm is needed, set this value to zero.
  • Page 60 Model FT4A Operation Simulation This menu allows for simulation of flow rate and temperature. It should only be used for testing and demonstration purposes. Make sure to return all of these simulation values to zero, before returning to the normal mode of operation.
  • Page 61 NOTE! Simulation Mode will be cleared if the power is cycled. K Factor The K Factor allows the user to adjust the meter’s calibration. The Fox Thermal flow meter increases the calculated flow rate by the K Factor. This results in a direct scaling of the meter’s output across the entire full range.
  • Page 62 Reset CRC If the NVRAM CRC check fails (Error Code 36), the programmed settings values will need to be verified and corrected before clearing the error. Call Fox Thermal Customer Service if you need assistance. RESET CRC? Press YES (F1) ONLY if you want to reset the CRC and generate a new CRC value.
  • Page 63 If the CAL-V™ test does not produce a "PASS" result, refer to "CAL-V™ Test Results" on page 65. NOTE! If the CAL-V™ test is performed using the Fox Thermal FT4A View™ Software, at the completion of the test, a CAL-V™ Certificate may be printed for a record of the test. This certificate will display a pass/fail result.
  • Page 64 Model FT4A Operation CAL-V MENU EXIT Press VER (F1) to perform the CAL-V™ verification test. VERIFY CAL-V? Press YES (F1) to continue. Flo:Hold value EXIT Press NXT (F1) key to toggle between Hold value and Go to zero, see the screen below. During the CAL-V test, Hold value will keep the flow 4-20mA and Pulse outputs at the last value measured.
  • Page 65 Remove the probe from the pipe, clean the sensor, and perform the test again under a normal or high flow rate. If a "Warning or "Fail" result is displayed after repeating the test, please call Fox Thermal Service at (831) 384-4300 for assistance.
  • Page 66 This menu allows the user to select a gas or gas mix from a pre-calibrated list of gases/gas mixtures available in the Fox Thermal model FT4A flow meter. When entering the FT4A gas menu the user will have three choices: 1.
  • Page 67 Model FT4A Operation MAIN MENU EXIT Press FLO (F2) from the Main Menu to enter Flow Menu 1. FLOW MENU 1 EXIT Press FM2 (F3) to get to Flow Menu 2. FLOW MENU 2 EXIT Press GAS (F1) to access the Gas-SelectX feature.
  • Page 68 Model FT4A Operation Gas-SelectX Single Gas Menu ® To select a pure gas, choose "Pure Gas" (F1) and then press "OK" (F4) to accept the setting: GAS=Air EXIT To choose any pure gas, press NXT (F1) to cycle through until the correct gas is displayed and press OK (F4) to select the gas.
  • Page 69 Press OK (F4) to set the mixture. ® After the gases are programmed, the FT4A will begin to monitor flow based on the pre-calibrated algorithm for the gas/gas mix selected in the Gas-SelectX feature. The screen will show the flow in ®...
  • Page 70 NOTE! The data shown in brackets < > represents one byte of data. Modbus Indicators Green LED indicator LP3 cycles on and off to indicate that the FT4A is operating. Orange LED indicator LP2 blinks when Modbus signals are received and yellow LP1 blinks when Modbus signals are transmitted.
  • Page 71 Model FT4A Communications Read Multiple Registers (command 03) This command reads one or more 16-bit registers from the FT4A and has the following format: Request: <Meter Address> <Command code=03> <Register start address high> <Register start address low> <Register count high> <Register count low> <CRC high> <CRC low>...
  • Page 72 Model FT4A Communications Table 5.1: FT4A Modbus Registers (cont'd) Modbus Data Type Description Units Register 40022 32-bit float LSW Total User selected 40023 32-bit float MSW 40024 - 40025 Reserved 40026 32-bit float LSW Temperature User selected 40027 32-bit float MSW...
  • Page 73 Model FT4A Communications Read Single Register (Command 04) This command is used to report the status information. Request: <Meter Address> <Command code=04> <Register address =0> <Register address =0> <Register count =0> <Register count =1> <CRC high> <CRC low> Response: <Meter Address> <Command code=04> <Byte count =2> <Status High><Status Low> <CRC high>...
  • Page 74 Model FT4A Communications Table 5.3: Status 2 Bits Definitions for Command 04, Modbus Address 30002 Definition Pulse hardware Busy Not used Not used CAL-V in process CAL-V fail CAL-V aborted CAL-V warning Write Single Register (Command 06) This command is used to perform miscellaneous functions such as clearing the totalizer and elapsed time.
  • Page 75 Model FT4A Communications byte of the lower numbered register holds the next most significant byte of the significand. The most significant byte of the higher numbered register holds the sign bit and most significant 7 bits of the exponent. The least significant byte of the higher numbered register holds the least significant bit of the exponent and the most significant 7 bits of the significand.
  • Page 76 Model FT4A Communications be set to 60.0, register pair 40090-40091 will be set to 40.0, and the rest of the register pairs between them will be set to 0.0. The message byte stream will be (bytes on the same line are sent leftmost first): <0x01>...
  • Page 77 Model FT4A Communications Request: <Meter Address> <Function code=06> <Register address high=0x00> <Register address low=0x1F> <Register data high=0x00> <Register data low =0xx> <CRC high> <CRC low> Response: <Meter Address> <Function code=06> <Register address =0x00> <Register address =0x1F> <Register data=0x00> <Register data =0xx> <CRC high> <CRC low>...
  • Page 78 ® the model FT4A. Selecting FT4A Gases and Gas Mixes Modbus register 40056 selects the gas type, which may be a pure gas (plus NAESB natural gas composition), custom gas mix, or custom oil & gas mix. Register 40057 will read zero, and register 40056 will read the gas selection that was chosen.
  • Page 79 32 bit floating point value - this value is split in two 16 bit registers. Ensure that all gases total up to 100%. Do not write a custom gas percent when the gas select code is set to a pure gas. Table 5.5: FT4A Modbus Holding Registers for Gas-SelectX® 40056 16-bit int...
  • Page 80 Model FT4A Communications 40068 32-bit float LSW Propane percentage Percent (31.4 = 31.4%) 40069 32-bit float MSW 40070 32-bit float LSW Helium percentage Percent (31.4 = 31.4%) 40071 32-bit float MSW 40072 32-bit float LSW Oxygen percentage Percent (31.4 = 31.4%)
  • Page 81 Variable. HART Communication is supported on this loop. The 4-20mA output of the FT4A should be configured for flow rate when using HART. If the 4-20mA output is set to report temperature, HART communication will report the 4-20mA value for temperature rather than flow.
  • Page 82 Communications HART Indicators Green LED indicator LP3 cycles on and off to indicate that the FT4A is operating. Orange LED indicator LP2 blinks when HART signals are received and Yellow LP1 blinks when HART signals are transmitted. The LEDs are located behind the display panel.
  • Page 83 Model FT4A Communications Dynamic Variables Four Dynamic Variables are implemented. Variable Meaning Units Flow Rate In Selected Units Total In Selected Units Temperature In Selected Units Elapsed Time In Hours Status Information Device Status Bit 4 ("More Status Available") is set when any failure is detected. Command #48 provides additional detail.
  • Page 84 Fixed current mode is implemented, using Command 40. This mode is cleared by power loss or reset. Damping Damping is standard, affecting only the PV and the loop current signal. Capability Checklist Manufacturer, model Fox Thermal Instruments, FT4A Device Type Transmitter HART revision Device Description available...

  • Page 85: Maintenance

    CAUTION! BE SURE POWER TO METER IS SWITCHED OFF BEFORE ATTEMPTING TO ACCESS ELECTRONICS. If there is a problem and a loose connection is not found, please contact Fox Thermal Customer Service for technical assistance at (831) 384-4300. Maintenance | 85...
  • Page 86 Refer to "Returning Your Meter" on p. 106. Flow Calibration and Calibration Validation To ensure high accuracy of your model FT4A Flow Meter, Fox Thermal provides a full NIST traceable calibration. It is recommended that the meter's accuracy be checked annually by performing the CAL-V™...
  • Page 87 Model FT4A Maintenance Instructions for Removing and Inserting the Meter from a Pressurized Pipe using the Retractor WARNING! Possible injury or damage to equipment may occur if the retractor is not used correctly. Please read the following instructions carefully prior to using the retractor.
  • Page 88 Model FT4A Maintenance Step 2 - Remove the Probe from the Retractor Body 5. After removing the probe from the flow stream (#1-4 on previous page), slowly loosen the compression fitting (see figure 6.2), until the pressure in the retractor is relieved.
  • Page 89 Model FT4A Maintenance How to Insert the Probe into the Flow Stream (Valve closed, System Pressurized) 1. Carefully, slide the probe into the retractor. 2. Install the collar clamp just below the collar spacer, and tighten it in place on the probe.
  • Page 90 Model FT4A Maintenance 5. Secure the probe in place by tightening the compression nut with a 1 ⅛" wrench and a 1 ¼" wrench on the compression fitting. See p. 27 of the manual for detailed instructions to tighten the compression nut.

  • Page 91: Troubleshooting

    2. Inadequate power source. The FT4A requires 12 to 24VDC at to 6 Watts to operate. A 20 Watt power supply is recommended for powering the FT4A to ensure it operates properly under all temperature ventilation, and power on conditions. If the voltage supplied at the input terminals of the FT4A is not within the range of 10VDC to 30VDC, a variety of problems can occur including a dim display, inaccurate flow readings or faulty 4-20mA, pulse and communication interface.
  • Page 92 CAUTION! The electronics and sensor supplied by Fox Thermal are calibrated as a single precision mass flow meter. Interchanging sensors will decrease the accuracy of the flow meter. If you experience any problem with your model FT4A flow meter, call Fox Thermal Customer Service Department, Technical Assistance at (831) 384-4300.
  • Page 93 Model FT4A Troubleshooting Problem Possible Cause(s) Action(s) Display Error 1. Loose or damaged 1. Visual inspection. ribbon cable 2. Return the meter or display for repair. 2. Damaged electronics 3. Operate meter between -20 to 70°C 3. Ambient temperature Flow measure- 1.
  • Page 94 Model FT4A Troubleshooting Troubleshooting CAL-V™ If the FT4A Meter fails a CAL-V™ Calibration Validation test, there are a few reasons that could be the cause: 1. Flow rate in the pipe: • Run the test again under a higher flow rate if possible.
  • Page 95 Check ALM = LoTempAlm Check the CSV voltage in ENG menu of the Engineering Screens, refer to page 15. It should be approximately 0.04 volts when FT4A is measuring no flow and up to 0.25 volts at high flow.
  • Page 96 Gas-SelectX Gas Selections: ® Pure gas menu, Gas Mix Menu, and Oil & Gas Mix Menu. See the Fox Thermal website for more information on availability of current gases. Units of Measurement (field selectable): SCFM, SCFH, NM3/M, NM3/H, NM3/D, NLPS, NLPM, NLPH, MCFD, MSCFD, SCFD, MMSCFD, MMSCFM, SM3/D, SM3/H, SM3/M, LB/S, LB/M, LB/H, LB/D, KG/S, KG/M, KG/H, SLPM, MT/H Gas Pressure (maximum at 100º...
  • Page 97 0-73,500 NOTE! To determine if the FT4A will operate accurately in other pipe sizes, divide the maximum flow rate by the pipe area. The application is acceptable if the resulting velocity is within the velocity range above. Check Fox Thermal website for velocity calculator.
  • Page 98 Input Power: 12 to 24VDC, 6 watts Full Input Power Range: 10 to 30VDC. A 20 Watt or greater power supply is recommended to power the FT4A. Class I Equipment (Electrical Grounding Required for Safety). Installation (Over-voltage) Category II for transient over-voltages.

  • Page 99: Agency Approvals

    Model FT4A Appendix Agency Approvals CE: Approved EMC Directive; 2014/30/EU Electrical Equipment for Measurement, Control and Lab Use: EN61326-1:2013 Pressure Equipment Directive: 2014/68/EU Weld Testing: EN ISO 15614-1 and EN ISO 9606-1, ASME B31.3 FM (FM16US0005X) and FMc (FM16CA0005X): Approved Class I, Division 1, Groups B,C,D;...

  • Page 100: Dimensions

    Model FT4A Appendix Fig. 7.1: Insertion Meter with Retractor Dimensions Dimensions shown in inches (millimeters). 5.97 [151.6] 4.64 [118.0] (61.0) 2X 3/4" NPT (160.0) (170.0) FEMALE RESTRAINT CABLE RESTRAINT CABLE MOUNT RETRACTOR WITH 1 INCH FULL PORT BALL VALVE 9.0±.3 "LL"...
  • Page 101 Model FT4A Appendix Fig. 7.2: Insertion Meter Dimensions 5.97 [151.6] 4.64 [118.0] 2.60 [66.1] 2X 3/4˝ FNPT PORTS 6.70 [170.3] ELECTRONICS ENCLOSURE SET SCREWS FLOW DIRECTION INDICATOR PROBE ˝LL˝ NOMINAL LENGTH C L SENSING AREA .73 [18.5] ø.75 [19.1] Table 7.2: Insertion Meter with 316 stainless steel probe...
  • Page 102 Model FT4A Appendix Fig. 7.3: Dimensions, Inline Meter with Flow Body and NPT End Connections Table 7.3: Inline Meter with Flow Body and NPT End Connections Body Size Body Size Dimension “L” ± .10 Dimension "H" ± .10 [model code]...
  • Page 103 Model FT4A Appendix Fig. 7.4: Dimensions, Inline Meter with Flow Body and 150# RF Flange End Connections Table 7.4: Inline Meter with Flow Body and 150# RF Flange End Connections Body Size Body Size Dimension “L” ± .10 Dimension "H" ± .10...
  • Page 104 Model FT4A Appendix Fig 7.5: Dimensions, Inline Meter with Flow Body and 300# RF Flange End Connections Table 7.5: Inline Meter with Flow Body and 300# RF Flange End Connections Body Size Body Size Dimension “L” ± .10 Dimension “H” ± .10...

  • Page 105: Warranty

    Warranty Statement and Terms and Conditions Limited Warranty - All Products Fox Thermal warrants that for a period of one year following the date of original shipment of Fox’s products that the product will conform to Fox’s standard written specifications applicable to such product and will be free from defects in workmanship.

  • Page 106: Returning Your Meter

    The Fox Thermal Customer Service Department (PH: 831- 384-4300) can help you through the process of returning a meter for service. If it becomes necessary to return a Fox Thermal flow meter for service or recalibration, please follow these steps: 1.
  • Page 107 If you have already shipped your meter to Fox Thermal for servicing and would like to check the status of your meter, please fill out our online Service Order Status form located at www.foxthermal.com and you will hear from a Customer Service Rep within 1 business day of your requested update.

  • Page 108: Definitions

    Model FT4A Appendix Glossary of Terms and Definitions American Wire Gauge and Technology Bara Bar absolute Normal Liter Contact NLPH Normal Liter per Hour Calibration NLPM Normal Liter per Minute Change Normal cubic Meter Communication NM3/H Normal cubic Meter per Hour...
  • Page 109 Model FT4A Appendix Index Access to Electronics, p. 33 Preventative Maintenance, p. 86 Alarm Codes, p. 95 Product Description, p. 17 Alarm wiring, p. 40 Programming Analog 4-20mA output, p. 48 Analog 4-20mA Output, p. 48 Breakage or Damage of Probe, p. 87 Alarm Output, p.
  • Page 110 Definition of Terms Wiring NOTE! is used for Notes and Troubleshooting Tips Information WARNING! is used to indicate a hazardous situation which, if not avoided, could result in death or serious injury. CAUTION! is used to indicate a hazardous situation which, if not avoided, could result in minor or moderate injury.

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